lib-sieve: sieve-storage - Add sieve_storage_hash()

src/lib-sieve/sieve-storage-private.h

@@ -132,6 +132,7 @@ int sieve_storage_setup_bin_path(struct sieve_storage *storage, mode_t mode);
 
 int sieve_storage_cmp(const struct sieve_storage *storage1,
 		      const struct sieve_storage *storage2);
+unsigned int sieve_storage_hash(const struct sieve_storage *storage);
 
 /*
  * Active script

src/lib-sieve/sieve-storage.c

@@ -4,6 +4,7 @@
 #include "lib.h"
 #include "array.h"
 #include "str-sanitize.h"
+#include "hash.h"
 #include "home-expand.h"
 #include "eacces-error.h"
 #include "mkdir-parents.h"
@@ -854,6 +855,16 @@ int sieve_storage_cmp(const struct sieve_storage *storage1,
 	return null_strcmp(storage1->location, storage2->location);
 }
 
+unsigned int sieve_storage_hash(const struct sieve_storage *storage)
+{
+	unsigned int hash = 0;
+
+	hash ^= POINTER_CAST_TO(storage->storage_class, unsigned int);
+	hash ^= str_hash(storage->location);
+
+	return hash;
+}
+
 /*
  * Script access
  */